class_docstr: Tests for overlap matrix
docstr: Test that overlap_matrix returns the correct matrix.
docstr_tok: ["Test","that","overlap_matrix","returns","the","correct","matrix","."]
code: def test_overlap_matrix(self, symbols, geometry, alpha, s_ref):
      r"""Test that overlap_matrix returns the correct matrix."""
      mol = qchem.Molecule(symbols, geometry, alpha=alpha)
      args = [alpha]
      s = qchem.overlap_matrix(mol.basis_set)(*args)
      assert np.allclose(s, s_ref)
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane import qchem
label_desc: Use image node_id 1 for calling the TestOverlapMat obj's underlying member method code with example usage: obj.test_overlap_matrix(symbols, geometry, alpha, s_ref) without return types